I'm an FPGA and embedded engineer who takes digital hardware from spec to working bring-up on real boards, architecture, RTL, verification, synthesis, timing closure, and on-board validation. On the FPGA side I write production-grade Verilog/SystemVerilog, build and debug designs in Vivado and Vitis (also ISE and Quartus when a project needs them), and target Xilinx Zynq-7000, Zynq UltraScale+, Artix/Kintex-7, and Lattice parts. Day-to-day work: clean RTL (FSMs, pipelining, CDC), AXI4/AXI-Lite/AXI-Stream SoC integration, custom IP, and constraint/timing closure on designs that have to actually meet Fmax, not just simulate. Verification is part of the job, not an afterthought, SystemVerilog testbenches, functional and code coverage, and assertions. I simulate in ModelSim/QuestaSim, Verilator, and Icarus, and debug on hardware with ILA, logic analyzer, scope, and JTAG. I go deep on RISC-V: custom RV cores, ISA extensions, and emulators, including instruction-set modification and syscall/binary remapping at the userspace level. On the embedded side I write C/C++ for microcontrollers and Linux, work with the GCC/LLVM toolchain, and handle interfaces like UART, SPI, I2C, DMA, PCIe, and Ethernet. If you have hardware or low-level software problems or need a new solution, send the spec and I'll reply with a clear scope and timeline.

I design and de-risk embedded control systems for hardware startups and product teams, taking ideas from early concept to working, production-ready prototypes. My work focuses on system architecture, hardware reliability, and firmware integration, helping teams avoid costly redesigns and integration failures common in early hardware development. I typically support clients with: • Embedded system architecture and feasibility analysis • Custom PCB design with a strong focus on power, safety, and manufacturability • Firmware development and bring-up for STM32, ESP32, and ARM-based systems • Hardware–firmware integration and prototype validation I have worked on products spanning industrial electronics, robotics, agriculture, and connected devices, often with founders or teams building hardware for the first time. I prefer projects where: • Requirements are clear or can be structured early • Technical decisions matter long-term • Quality and reliability are more important than quick fixes If you are building a hardware product and want it engineered correctly from the start, I’m happy to discuss how to reduce risk and move efficiently toward a working prototype.

I'm a Robotics and Industrial Automation Engineer (Mechatronics + Masters in Systems Engineering – Robotics) who takes projects from CAD concept to working, controlled hardware. I work across four connected areas: • Robotics — CAD modeling, DH-parameter kinematic modeling (FK/IK), simulation and control programming for custom-built robotic arms (5 DOF, 6 DOF) and branded COBOTs (UR5, Franka Emika Panda, JAKA Pro 16, Fairy Innovations FR3). • Industrial Automation — conveyor and vertical-lift systems (FLEXKON, QIMAROX), PLC & HMI programming (Omron, Mitsubishi, Delta), servo/motor drive control, and control panel design. • CAD Modeling & FEA — mechanism design and finite element analysis for COBOTs, robotic arms, and BLDC-based precision actuators, validated before manufacturing. • IoT & IIoT — Node-RED flow development, MQTT communication, Raspberry Pi master/slave setups, and live cloud/local dashboards for monitoring and control. Recent highlight: programmed a JAKA Pro 16 cobot and connected it to a digital weight scale over a serial connection using Node-RED, then built a custom Node-RED dashboard so an operator can trigger and control the robot's pick-and-place programs directly from live scale readings — a full sensor-to-robot control loop. I've worked with YKK Pakistan, the National Center of Robotics & Automation, and HumanTek, and I simulate and validate work in RoboDK and JAKA's simulator before it ever touches hardware, so clients get fewer surprises at deployment. If your project needs a robot arm designed and simulated, a control panel wired and programmed, or sensors and a robot connected into one working dashboard — I can take it end to end. Let's talk about what you're building.

More than 20 years of experience. University of Tennessee, Master Electrical and Computer Engineer. Electronic engineering design and development. Large experience product development, prototypes, microcontroller based products design, PCB board design, layout, schematics, firmware, c language programming. Also Xilinx and Altera FPGA programming. LabVIEW programming. Electrocardiogram, Electroencephalogram, ECG, EEG, EKG, Optical Heart Rate Monitor, PPG, SpO2, ADS1292, ADS1292R, ADS1293, ADS1293R, ADS1294, ADS1298,ADS1198, ADS1296,MAX30101, MAX30102, MAX32664, STM32WB, STM32WL, SAMD21,EFR32MG. Several successful freelance projects developed: 1. Ultrasonic Flaw Detector (NDT - Non Destructive Test) . High frequency (2 MHZ to 20MHz) ultrasonic pulses MAX4810, AD8331, AD9271 and the highly integrated MAX2084. 2. Bluetooth Heart Rate and Oximeter Wrist Watch Monitor . MAX30101, ATSAMD21J18 MCU, Bluetooth, LED, buzzer, and Android APP. 3. Microsoft XBOX Keyboard controller firmware for Gamming Keyboard. Custom Keyboard that could be used simultaneously as HID Keyboard, HID Mouse, XBOX Microsoft controller and MIDI controller. USB descriptors and USB enumerations, optical analog sensors. 4. Diaphragm Pacer System for ALS patients . NeuRx DPS (Synapsebiomedical.com). 5. Electronic Cigarette, 200W Regulable and Rechargeable with Touch LCD. LTC3887 350kHz Step-Down Converter with PMBus. 6. EEG Wireless. Electroencephalogram sensor 8-Differential Channels/electrodes ADS1299 with Bluetooth. Service Description: Time-to-Digtal converter. CADSOFT, EAGLE PCB design, Schematic and Layout. Microcontroller programming. FPGA programming XILINX, ALTERA. Labview programming. Labview FPGA programming. USA, University of Tennessee Knoxville, Master Electrical and Computer Engineer.

Greetings! I'm Don Collins, an Electronics Engineer with a broad range of expertise, including low-level technologies, transmission protocols, IoT development, and familiarity with various System-on-Chip (SoC) platforms. If you require assistance with projects involving different SoCs, you've come to the right place. I have hands-on experience working with a variety of SoCs, enabling me to tailor solutions to your specific requirements. Some of the SoCs I am familiar with include: - ARM Cortex Chips: I possess knowledge and expertise in programming ARM Cortex-based microcontrollers and processors. Whether you're working with Cortex-M0, Cortex-M3, Cortex-M4, or other variants, I can help you leverage the full potential of these powerful chips. - 8-bit PIC chips: With experience in programming 8-bit PIC microcontrollers, I can assist you in developing efficient and optimized solutions using the powerful and versatile PIC architecture. I am well-versed in utilizing tools like mikroC to program these chips. - Nordic NRF chips: Nordic Semiconductor's NRF series offers a range of versatile and feature-rich SoCs. I have familiarity with programming NRF chips, enabling seamless integration of these chips into your projects, whether it's for wireless communication, IoT applications, or other functionalities. - ESP32s and ESP8266: These popular SoCs from Espressif Systems are widely used for IoT applications and Wi-Fi-enabled devices. I am proficient in programming both ESP32 and ESP8266 chips, allowing me to create robust and reliable solutions for your IoT projects. My familiarity with these SoCs extends beyond basic programming. I understand their capabilities, hardware integration nuances, and how to optimize their performance for your specific requirements. I am passionate about delivering high-quality results and staying up-to-date with the latest advancements in technology. With my knowledge of SoCs, low-level programming, transmission protocols, and IoT development, I am well-equipped to tackle your most challenging projects. If you're seeking an experienced professional who can leverage the capabilities of various SoCs to bring your ideas to life, look no further. Let's collaborate and create innovative solutions using the power of these advanced chips. Feel free to reach out, and together we can achieve remarkable outcomes.

Is your inventory counting taking days instead of hours? Are stock discrepancies costing you money? Many RFID and inventory tracking projects fail — not because the idea is wrong, but because too much time and budget are lost on trial and error: ❌ Wrong RFID hardware choices — readers, antennas, or tags ❌ Unclear technical direction ❌ Multiple vendors that do not speak the same technical language That is why I prefer to start small and validate early. 🔎 HOW WE BEGIN — A FOCUSED FIRST STEP ✅ Understand your exact use case: • Warehouse inventory • Asset tracking • Stock counting • Process automation ✅ Select RFID hardware that actually fits the project: • UHF RFID readers • Fixed or handheld scanners • RFID tags and antennas ✅ Test the solution with a small pilot before scaling This approach helps avoid rework, reduces unnecessary back-and-forth, and keeps technical decisions simple. 🤝 WHY CLIENTS STAY WITH ME LONG-TERM I handle both RFID hardware integration and custom software development, including: • Inventory management systems • Real-time asset tracking dashboards • Barcode and RFID scanning applications • ERP and third-party system integrations There is no handoff between separate hardware and software teams. I've worked hands-on with major RFID platforms, including Zebra, Impinj, and Chainway — so hardware selection is based on real experience, not spec sheets. 🎯 One technical direction 🎯 One point of responsibility 🎯 Clear next steps If the first pilot works, we move forward phase by phase. If it does not, we stop early — before too much time or budget is spent. 🛠️ WHAT I CAN HELP YOU WITH • RFID inventory management systems (UHF fixed and handheld readers — Zebra, Impinj, and Chainway) • Hardware selection, integration, and testing (readers, antennas, printers, and tags) • Warehouse and stock-counting automation • Real-time asset tracking solutions • Barcode and RFID mobile applications • Barcode and RFID desktop software • ERP, API, and third-party integrations • Inventory workflow and process automation 📩 SEND ME A MESSAGE Send me a short description of your use case. I will tell you honestly whether RFID is the right fit and what the smallest practical first step would look like.

I’m Steven Calinski, an Embedded Systems & Firmware Engineer with a passion for solving problems using software or hardware designs. I have a strong background in electrical testing as well as embedded firmware development. I’ve worked on critical embedded projects for fire alarm systems, mobile computing hardware, RF designs, and IoT applications, handling everything from firmware development to EMI mitigation, component level debugging, production testing, schematic design, and board layouts. Languages: C, C++, C#, Python, VHDL RTOS: FreeRTOS, Zephyr RTOS MCU Experience: STM32: F7, H7, H5, H4, Atmel SAM E, Renesas RA, TI MSP430, Silicon Labs, ESP32, ESP32-S3 Firmware Debugging & Optimization: USB, I2C, UART, SPI, PWM, DMA, MQTT, Cellular Network, Current limiting, Power, Battery backup switching, driver creation. I have a background in electrical test engineering as well and am comfortable with hardware troubleshooting, rework, repair, etc. I have a basic rework setup in my home. I am very familiar using Saleae logic analyzer, and oscilloscope to address signal integrity issues. Automated Test Development: LabVIEW applications for engineering & regulatory testing, ESP32 IOT projects for test automation. PCB Schematic Capture & Layout: Cadence Allegro, KiCad, Eagle Board Bring-Up & Component-Level Debugging: Rapid prototyping and validation Microcontroller & RF Circuit Design: Sub-1GHz RF design, BLE integration Click "Invite to Job" or "Hire Me", and let me help you develop your next project.

Experienced Engineer with 7+ years in embedded application development using C++, C, LabVIEW, and LabVIEW FPGAs. Specializations include: * Training and tutoring in LabVIEW, C/C++, and electronics * LabVIEW code review * Language conversion (Python, Matlab, LabVIEW to C/C++/C# and vice versa) * Installer provision for C/C++/LabVIEW applications * Complete documentation with version control system * Arduino-based development * Analog & digital electronic circuit design * Multi-layer PCB design * Hardware design and PCB review Get professional support, and reliable deliverables for your project. Let's collaborate and achieve your goals.

I have experience in electronics more then 5 years. And i design so many Control board PCBs based on microcontroller (Arduino is my favorite). And I provide full support and help even after PCB or hardware design is finish. I have good knowledge of microcontroller programming so if there is a bug or error i can give you advice and suggestion in programming and hardware. In short, I will help you to build full product development Schematic design - PCB design - component mounting on PCB - Controller programming - 3D case designing - 3D printing - all fitting and testing Software knowledge KiCAD , FreeCAD , Arduino IDE , Atmel Studio , STM32 Cube IDE Programming Language known Embedded C , Arduino Programming , C , Python , Embedded Linux Hardware knowledge Arduino boards , Raspberry pi , AVR Microcontroller , 8051 Microcontroller , motors controlling (stepper , servo , DC motors) , LED matrix , USBasp Programmer, different types of sensors

With over 13 years of experience in PCB designing, hardware development, and component sourcing, I have successfully designed and implemented a wide range of projects. My expertise spans various domains, including FPGA-based systems, BLE (Bluetooth Low Energy), IoT (Internet of Things), NB-IoT (Narrowband Internet of Things), and power supply circuits. Key Highlights: - **PCB Design**: Proficient in creating intricate PCB layouts, including high-speed, differential pairs, and RF track and antenna routing. - **Layer Stack-Up**: Accomplished designs with up to 16 layers, ensuring optimal signal integrity and performance. - **EDA Tools**: Adept at using industry-standard EDA tools, including: - **Altium Designer**: Leveraging Altium's comprehensive suite for schematic capture, PCB layout, and 3D visualization. - **Autodesk Eagle and Eagle 360**: Familiar with Eagle's user-friendly interface and cloud-based collaboration features. - **Mentor Pads9.5 and Mentor Graphics PADS Pro VX.2.10**: Experienced in constraint-driven design and signal integrity analysis. - **Orcad Allegro 17.2**: Proficient in complex PCB designs using Cadence's powerful toolset. - **KiCad**: Skilled in open-source PCB design with KiCad, benefiting from its community-driven development. - **PCBweb, EasyEDA & Fritzing**: Versatile in using online platforms for various design requirements. - **MCUs and Processors**: Proficient with various microcontrollers (MCUs) and processors, including: - STM32 family (e.g., STM32F4, STM32H7) - Atmega series (e.g., Atmega328P) - PIC microcontrollers (e.g., PIC16, PIC18) - ARM Cortex-M series (e.g., Cortex-M0, Cortex-M4) - ESP8266 and ESP32 - Raspberry Pi (ARM-based) - Intel x86 processors (e.g., Core i7, Xeon) - AMD Ryzen processors - **FPGA Expertise**: Versed in designing for various FPGA families, tailoring solutions to project-specific requirements. - **Bluetooth Low Energy (BLE)**: A wireless, low-power communication standard for IoT devices. - **Global Navigation Satellite System (GNSS)**: Satellite-based positioning systems (e.g., GPS, Galileo) for location tracking. - **Narrowband IoT (NB-IoT)**: Cellular technology designed for low-power, wide-area IoT applications. - **Quality of Service (QoS)**: Ensuring reliable and predictable performance in IoT networks. PER hour rate for 2 Layer PCB=$10 PER hour rate for 4 Layer PCB =$20 PER hour rate for 6 Layers PCB=$25